Implementing getIndexes.view

It would be nice to ignore prefixes such as 'The' in there. Will think about it later.

api/browse.py

@@ -2,7 +2,8 @@
 
 from flask import request
 from web import app
-from db import MusicFolder
+from db import MusicFolder, Artist, Album, Track
+import uuid, time, string
 
 @app.route('/rest/getMusicFolders.view')
 def list_folders():
@@ -15,3 +16,78 @@ def list_folders():
 		}
 	})
 
+@app.route('/rest/getIndexes.view')
+def list_indexes():
+	musicFolderId = request.args.get('musicFolderId')
+	ifModifiedSince = request.args.get('ifModifiedSince')
+	if ifModifiedSince:
+		try:
+			ifModifiedSince = int(ifModifiedSince)
+		except:
+			return request.formatter({
+				'error': {
+					'code': 0,
+					'message': 'Invalid timestamp'
+				}
+			}, error = True)
+
+	if musicFolderId is None:
+		folder = MusicFolder.query.all()
+	else:
+		try:
+			mfid = uuid.UUID(musicFolderId)
+		except:
+			return request.formatter({
+				'error': {
+					'code': 0,
+					'message': 'Invalid id'
+				}
+			}, error = True)
+
+		folder = MusicFolder.query.get(mfid)
+
+	if not folder:
+		return request.formatter({
+			'error': {
+				'code': 70,
+				'message': 'Folder not found'
+			}
+		}, error = True)
+
+	last_modif = max(map(lambda f: f.last_scan, folder)) if type(folder) is list else folder.last_scan
+	last_modif_ts = int(time.mktime(last_modif.timetuple()))
+
+	if (not ifModifiedSince is None) and last_modif_ts < ifModifiedSince:
+		return request.formatter({ 'indexes': { 'lastModified': last_modif_ts } })
+
+	if type(folder) is list:
+		artists = Artist.query.all()
+	else:
+		artists = Artist.query.join(Album, Track).filter(Track.folder_id == mfid)
+
+	indexes = {}
+	for artist in artists:
+		index = artist.name[0].upper()
+		if index in map(str, xrange(10)):
+			index = '#'
+		elif index not in string.letters:
+			index = '?'
+
+		if index not in indexes:
+			indexes[index] = []
+
+		indexes[index].append(artist)
+
+	return request.formatter({
+		'indexes': {
+			'lastModified': last_modif_ts,
+			'index': [ {
+				'name': k,
+				'artist': [ {
+					'id': str(a.id),
+					'name': a.name
+				} for a in sorted(v, key = lambda a: a.name.lower()) ]
+			} for k, v in sorted(indexes.iteritems()) ]
+		}
+	})
+

db.py

@@ -10,7 +10,7 @@ from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.types import TypeDecorator
 from sqlalchemy import BINARY
 
-import uuid
+import uuid, datetime
  
 class UUID(TypeDecorator):
 	impl = BINARY
@@ -60,7 +60,7 @@ class MusicFolder(Base):
 	id = UUID.gen_id_column()
 	name = Column(String, unique = True)
 	path = Column(String)
-	last_scan = Column(DateTime, nullable = True)
+	last_scan = Column(DateTime, default = datetime.datetime.min)
 
 class Artist(Base):
 	__tablename__ = 'artist'